Well that depends on the temperatures and humidity conditions where you are, but check the pelts daily until they are starting to dry but are not hard, then carefully reverse the sking on the board and insert your sticks to let the air get in and finish drying the hide.
If you let it get too dry you will have to dampen the skin to get it turned or you will tear it.
I dry my pelts in a shop I use for skinning with a wood heater in it. The wood heat keeps the humidity down and they dry quite quickly so I have to really watch that I don't let it get away on me.
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